Cross-linking of S-nitrosothiolated AIEgen inside cancer cells to monitor NO release and reverse chemo-resistance

2021 ◽  
Author(s):  
Wen WU ◽  
Fan Ying ◽  
Luo Ting Rong ◽  
Yuchen Hu ◽  
Qingyu Zhang ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Multidrug Resistance ◽  
Cancer Cells ◽  
Cross Linking ◽  
Glycoprotein P ◽  
P Glycoprotein ◽  
No Release

Nitric oxide (NO)-releasing platforms have been demonstrated as promising approaches for the reversal of multidrug resistance (MDR) in cancer cells due to the suppression of P-glycoprotein (P-gp). However, the non-specific...

DJ-1 is involved in the multidrug resistance of SGC7901 gastric cancer cells through PTEN/PI3K/Akt/Nrf2 pathway

2020 ◽  
Vol 52 (11) ◽  
pp. 1202-1214
Author(s):  
Lejia Qiu ◽  
Zhaoxia Ma ◽  
Xiaoran Li ◽  
Yizhang Deng ◽  
Guangling Duan ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Multidrug Resistance ◽  
Cancer Cells ◽  
Gastric Cancer Cells ◽  
Glycoprotein P ◽  
Nrf2 Pathway ◽  
P Glycoprotein ◽  
New Findings ◽  
Nrf2 Signaling Pathway ◽  
Common Malignancy

Abstract Gastric cancer is a common malignancy worldwide. The occurrence of multidrug resistance (MDR) is the major obstacle for effective gastric cancer chemotherapy. In this study, the in-depth molecular mechanism of the DJ-1-induced MDR in SGC7901 gastric cancer cells was investigated. The results showed that DJ-1 expression level was higher in MDR variant SGC7901/VCR cells than that in its parental SGC7901 cells. Moreover, DJ-1 overexpression conferred the MDR phenotype to SGC7901 cells, while DJ-1 knockdown in SGC7901/VCR cells induced re-sensitization to adriamycin, vincristine, cisplatin, and 5-fluorouracil. These results suggested that DJ-1 mediated the development of MDR in SGC7901 gastric cancer cells. Importantly, further data revealed that the activation of PI3k/Akt and Nrf2 signaling pathway were required for the DJ-1-induced MDR phenotype in SGC7901 gastric cancer cells. Meanwhile, we found that PI3k/Akt pathway was activated probably through DJ-1 directly binding to and negatively regulating PTEN, consequently resulting in Nrf2 phosphorylation and activation, and thereby inducing Nrf2-dependent P-glycoprotein (P-gp) and Bcl-2 expressions in the DJ-1-mediated MDR of SGC7901 gastric cancer cells. Overall, these results revealed that activating PTEN/PI3K/Akt/Nrf2 pathway and subsequently upregulating P-gp and Bcl-2 expression could be a critical mechanism by which DJ-1 mediates the development of MDR in SGC7901 gastric cancer cells. The new findings may be helpful for understanding the mechanisms of MDR in gastric cancer cells, prompting its further investigation as a molecular target to overcome MDR.

scholarly journals Screening dietary flavonoids for the reversal of P-glycoprotein-mediated multidrug resistance in cancer

2016 ◽  
Vol 12 (8) ◽  
pp. 2458-2470 ◽  
Author(s):  
S. Mohana ◽  
M. Ganesan ◽  
B. Agilan ◽  
R. Karthikeyan ◽  
G. Srithar ◽  
...  
Keyword(s):  
Multidrug Resistance ◽  
Cancer Cells ◽  
Therapeutic Target ◽  
Glycoprotein P ◽  
P Glycoprotein ◽  
Dietary Flavonoids

P-Glycoprotein (P-gp) serves as a therapeutic target for the development of inhibitors to overcome multidrug resistance in cancer cells.

Reversal of P-glycoprotein-mediated multidrug resistance by novel curcumin analogues in paclitaxel-resistant human breast cancer cells

2020 ◽  
Vol 98 (4) ◽  
pp. 484-491 ◽  
Author(s):  
Lei Gao ◽  
Peiran Zhao ◽  
Yang Li ◽  
Dawei Yang ◽  
Ping Hu ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Multidrug Resistance ◽  
Cancer Cells ◽  
Cancer Cell Line ◽  
Positive Control ◽  
Promising Candidate ◽  
Glycoprotein P ◽  
Compound C ◽  
P Glycoprotein ◽  
Low Toxicity

Multidrug resistance (MDR) is a major obstacle for successful cancer chemotherapy, and the main cause of MDR has been attributed to overexpression of P-glycoprotein (P-gp). In this present study, four P-gp modulators (E,E)-4,6-bis(styryl)-2-(substituted amino)-pyrimidines were evaluated for their activity in a breast cancer cell line overexpressing P-gp (LCC6MDR). The four modulators displayed significantly better P-gp modulating activity compared with the positive control verapamil (RF = 5.4), with a relative fold (RF) increase in activity ranging from 33.3 to 86.0. In contrast to compounds a and c that exhibited lower cytotoxicity, compounds b and d were nontoxic towards both cancer cells and normal cells, with IC50 values greater than 100 μmol/L. The qRT-PCR results demonstrated that after exposure to 2 μmol/L of compounds a, b, c, and d, the mRNA expression level of MDR1 in LCC6MDR cells decreased to 45%, 50%, 38%, and 51%, respectively. However, the Western-blot results indicated that compound c could reverse P-gp mediated MDR, but not via decreases in protein expression. DOX and Rh123 accumulation and efflux results further confirmed that the reversal of MDR activity happens via inhibition of P-gp efflux and increases in intracellular drug accumulation. These results demonstrated that compound c has low toxicity and is an efficient P-gp modulator, highlighting its potential as a promising candidate for P-gp-mediated reversal of MDR.

scholarly journals Dual P-Glycoprotein and CA XII Inhibitors: A New Strategy to Reverse the P-gp Mediated Multidrug Resistance (MDR) in Cancer Cells

Molecules ◽  
2020 ◽  
Vol 25 (7) ◽  
pp. 1748 ◽  
Author(s):  
Elisabetta Teodori ◽  
Laura Braconi ◽  
Silvia Bua ◽  
Andrea Lapucci ◽  
Gianluca Bartolucci ◽  
...  
Keyword(s):  
Multidrug Resistance ◽  
Cancer Cells ◽  
Glycoprotein P ◽  
Reversal Effect ◽  
P Glycoprotein ◽  
New Strategy ◽  
Uptake Test ◽  
New Compounds ◽  
Alkanol Amine ◽  
Mdr Reversal

A new series of N,N-bis(alkanol)amine aryl diesters was synthesized and studied as dual P-glycoprotein (P-gp) and carbonic anhydrase XII inhibitors (CA XII). These hybrids should be able to synergistically overcome P-gp mediated multidrug resistance (MDR) in cancer cells. It was reported that the efflux activity of P-gp could be modulated by CA XII, as the pH reduction caused by CA XII inhibition produces a significant decrease in P-gp ATPase activity. The new compounds reported here feature both P-gp and CA XII binding moieties. These hybrids contain a N,N-bis(alkanol)amine diester scaffold found in P-glycoprotein ligands and a coumarin or benzene sulfonamide moiety to target CA XII. Many compounds displayed a dual activity against P-gp and CA XII being active in the Rhd 123 uptake test on K562/DOX cells and in the hCA XII inhibition test. On LoVo/DOX cells, that overexpress both P-gp and CA XII, some coumarin derivatives showed a high MDR reversal effect in Rhd 123 uptake and doxorubicin cytotoxicity enhancement tests. In particular, compounds 7 and 8 showed higher activity than verapamil and were more potent on LoVo/DOX than on K562/DOX cells overexpressing only P-gp. They can be considered as valuable candidates for selective P-gp/CA XII inhibition in MDR cancer cells.

scholarly journals Multiple Molecular Mechanisms to Overcome Multidrug Resistance in Cancer by Natural Secondary Metabolites

2021 ◽  
Vol 12 ◽  
Author(s):  
Mahmoud Zaki El-Readi ◽  
Ahmed M. Al-Abd ◽  
Mohammad A. Althubiti ◽  
Riyad A. Almaimani ◽  
Hiba Saeed Al-Amoodi ◽  
...  
Keyword(s):  
Multidrug Resistance ◽  
Secondary Metabolites ◽  
Cancer Cells ◽  
Molecular Mechanisms ◽  
Plant Secondary Metabolites ◽  
Cell Growth Inhibition ◽  
Glycoprotein P ◽  
P Glycoprotein ◽  
Drug Concentrations ◽  
Pharmaceutical Agents

Plant secondary metabolites (SMs) common natural occurrences and the significantly lower toxicities of many SM have led to the approaching development and use of these compounds as effective pharmaceutical agents; especially in cancer therapy. A combination of two or three of plant secondary metabolites together or of one SM with specific anticancer drugs, may synergistically decrease the doses needed, widen the chemotherapeutic window, mediate more effective cell growth inhibition, and avoid the side effects of high drug concentrations. In mixtures they can exert additive or even synergistic activities. Many SM can effectively increase the sensitivity of cancer cells to chemotherapy. In phytotherapy, secondary metabolites (SM) of medicinal plants can interact with single or multiple targets. The multi-molecular mechanisms of plant secondary metabolites to overcome multidrug resistance (MDR) are highlighted in this review. These mechanisms include interaction with membrane proteins such as P-glycoprotein (P-gp/MDR1); an ATP-binding cassette (ABC) transporter, nucleic acids (DNA, RNA), and induction of apoptosis. P-gp plays an important role in the development of MDR in cancer cells and is involved in potential chemotherapy failure. Therefore, the ingestion of dietary supplements, food or beverages containing secondary metabolites e.g., polyphenols or terpenoids may alter the bioavailability, therapeutic efficacy and safety of the drugs that are P-gp substrates.

scholarly journals Immuno-oncology agent IPI-549 is a modulator of P-glycoprotein (P-gp, MDR1, ABCB1)-mediated multidrug resistance (MDR) in cancer: In vitro and in vivo

2019 ◽  
Vol 442 ◽  
pp. 91-103 ◽  
Author(s):  
Albert A. De Vera ◽  
Pranav Gupta ◽  
Zining Lei ◽  
Dan Liao ◽  
Silpa Narayanan ◽  
...  
Keyword(s):  
Multidrug Resistance ◽  
Glycoprotein P ◽  
P Glycoprotein

scholarly journals Extract from Dioscorea bulbifera L. rhizomes aggravate pirarubicin-induced cardiotoxicity by inhibiting the expression of P-glycoprotein and multidrug resistance-associated protein 2 in the mouse liver

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Li-rui Sun ◽  
Qiu-shi Guo ◽  
Wei Zhou ◽  
Min Li
Keyword(s):  
Multidrug Resistance ◽  
Mouse Liver ◽  
Adverse Reactions ◽  
Heart Tissue ◽  
Efflux Transporters ◽  
Glycoprotein P ◽  
Chinese Herbal ◽  
Good Safety Profile ◽  
P Glycoprotein ◽  
Dioscorea Bulbifera

AbstractChinese herbal medicine is widely used because it has a good safety profile and few side effects. However, the risk of adverse drug reactions caused by herb-drug interactions (HDIs) is often overlooked. Therefore, the task of identifying possible HDIs and elucidating their mechanisms is of great significance for the prevention and treatment of HDI-related adverse reactions. Since extract from Dioscorea bulbifera L. rhizomes (DB) can cause various degrees of liver damage, it is speculated that HDIs may occur between DB extract and chemicals metabolized or excreted by the liver. Our study revealed that the cardiotoxicity of pirarubicin (THP) was increased by co-administration of DB, and the expression of P-glycoprotein (P-gp) and multidrug resistance-associated protein 2 (Mrp2) in the liver was inhibited by DB extract, which led to the accumulation of THP in heart tissue. In conclusion, there are risks of the co-administration of DB extract and THP. The mechanism of HDIs can be better revealed by targeting the efflux transporters.

Expression of hamster P-glycoprotein and multidrug resistance in DNA-mediated transformants of mouse LTA cells

1987 ◽  
Vol 7 (2) ◽  
pp. 718-724
Author(s):  
K L Deuchars ◽  
R P Du ◽  
M Naik ◽  
D Evernden-Porelle ◽  
N Kartner ◽  
...  
Keyword(s):  
Multidrug Resistance ◽  
Dna Sequences ◽  
Multidrug Resistant ◽  
Cross Resistance ◽  
Recipient Mouse ◽  
Strongly Correlated ◽  
Wild Type ◽  
Glycoprotein P ◽  
Single Drug ◽  
P Glycoprotein

The overexpression of a plasma membrane glycoprotein, P-glycoprotein, is strongly correlated with the expression of multidrug resistance. This phenotype (frequently observed in cell lines selected for resistance to a single drug) is characterized by cross resistance to many drugs, some of which are used in cancer chemotherapy. In the present study we showed that DNA-mediated transformants of mouse LTA cells with DNA from multidrug-resistant hamster cells acquired the multidrug resistance phenotype, that the transformants contained hamster P-glycoprotein DNA sequences, that these sequences were amplified whereas the recipient mouse P-glycoprotein sequences remained at wild-type levels, and that the overexpressed P-glycoprotein in these cells was of hamster origin. Furthermore, we showed that the hamster P-glycoprotein sequences were transfected independently of a group of genes that were originally coamplified and linked within a 1-megabase-pair region in the donor hamster genome. These data indicate that the high expression of P-glycoprotein is the only alteration required to mediate multidrug resistance.

scholarly journals Pharmacokinetic Alteration of Paclitaxel by Ferulic Acid Derivative

Pharmaceutics ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 593 ◽  
Author(s):  
Jaeok Lee ◽  
Song Wha Chae ◽  
LianJi Ma ◽  
So Yeon Lim ◽  
Sarah Alnajjar ◽  
...  
Keyword(s):  
Multidrug Resistance ◽  
Ferulic Acid ◽  
Acid Derivative ◽  
Glycoprotein P ◽  
P Glycoprotein ◽  
Substrate Drug

P-glycoprotein (P-gp) is known to be involved in multidrug resistance (MDR) and modulation of pharmacokinetic (PK) profiles of substrate drugs. Here, we studied the effects of synthesized ferulic acid (FA) derivatives on P-gp function in vitro and examined PK alteration of paclitaxel (PTX), a well-known P-gp substrate drug by the derivative. Compound 5c, the FA derivative chosen as a significant P-gp inhibitor among eight FA candidates by in vitro results, increased PTX AUCinf as much as twofold versus the control by reducing PTX elimination in rats. These results suggest that FA derivative can increase PTX bioavailability by inhibiting P-gp existing in eliminating organs.

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